Portable band saw mill



3 Sheets-Sheet 1.

(No Model.)

H. W. GROVES.

PORTABLE BAND SAWMILL. V v N0.-Z78,986. Patented June 5,1883.

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(No Model.) 3 Sheets-Sheet 2.

H. W. GROVES.

PORTABLE BAND SAW MILL.

No. 278,936. Patented June 5,1883.

N. PETERS. Pmwume n hec wuhm wn. D. Q

a Sheets-Sheet 3.

(No Model.)

H. W. GROVES.

' PORTABLE BAND SAW MILL.

No. 278,936. Patented June 5,1883.

N. PETERS. Phulo-Llmognphar, wmm m. L. v.

UNITED STATES 'ATENT f Fries.

HEXRY \V. GROVES, OF INDIANAPOLIS,- INDIANA, ASSIGNOR OF ONE-HALF TOSINKER, DAVIS COMPANY, INDIANA.

PORTABLE BAND SAW MILL- SPECIFICATION forming part of Letters Patent No.278,936, dated June 5, 1883.

' Application tiled March 152, 1883. (No model) I To aZZ whom it may001mm Be it known that I, HENRY \V. GRovEs, ot

Indianapolis, Marion county, Indiana, have invented a new and usefulImprovement in Portable Band Saw Mills, of which the following is adescription, reference being made to the accompanying drawings, (threesheets,) in the several figures of which like letters indicate likeparts. 7

My invention relates to that class of lumbermills which operate by meansof band-saws;

- and my object is to provide a saw-mill which shall be portable and notrequire to beper manently attached to a building.

In the drawings, Figure 1 is aside view of saw in proper place on thewheel; and Fig. 6 v

is an enlarged'view of the eccentric tightening device. Fig. 7 is anenlarged view of the same eccentric, and will be hereinafter explained.

In detail, F F is the frame-work of the machine; Dp, the driving-pulley,mounted on the same axis, A as the lower saw-pulley, S p,

wheel, 010".

the upper cone-wheel, has a separate flange which axis also carries thebevel-wheel By, set to engage with the bevel-wheel By" at right angles,the axis of the latter being that of the lower friction-pulley, F1), andthe lower cone- This cone-wheel, like its fellow,-

for each section, and thetwo wheels are connected by a series ofseparate belts, b b. b, the

cone-wheels being reversed in position in relation to each other, andthe belts are prevented by the flanges from slipping off, as shown inFig.

1. The bands on these wheels are tightened by means of a series oflevers, Z, which hang upon a rod, r, Fig. 3, and have an arm which isconnected with a tightening 'pulley, t1). (Shown in dotted lines, Fig."3.) On the axis rack R, underneath the] 0gcarriage G, on which i the logL rests.

El is an eccentric or reverse lever having an eccentric boxing, Eb, bymeans of which lever the shifting-pulley Spcan be crowded againstthefriction-pulley F1), and the intermediate friction-pulley, F11 whichworks on. a hinge, h, Fig. 3, in a yoke 1 Upon the axis A of thesaw-pulley Sp is fixed a cross-head, Ch, whichis adjustable up and downon its frame C711 by means of theratchet -le ver RI, having a ratchet,r, and which is attached to a rod, r, which is threaded to engage with anut, 01, in the end of the lever-arm a. On the end of this lever is atensionweight Tu, which serves to keep the cross-head and its axis andthe saw-pulley Sjr" up close against the saw. The end of this rod rworks in a nutor collar, i fitted in a pro jection in the long boxingbar, and when the ratchet-lever is turned the rod r forces the boxingIn: upward or downward, as desired, the object of this device being tocarry the cross-head and saw-pulley up or down togetherto tighten orloosen the saw. A further adjustment, by means of which the saw-pulleySp may be thrown outward or inward when ever necessary to bring the twosaw-pulleys in line with each other, is provided for by the rod 1', atone end of which is the hand-wheel H10, and whose other end, I), isscrewed firmly into a boss or projection in the boxing bx. Collars ccare also provided, between which is the end of a brace or stay rod, St,the other end of which is firmly attached to or made integral with thecross-head.

The bracket-arms Ba and Ba, bolted to the frame, are formed with boxingsb b through which pass the guide-arms Ga Ga, the lower outer boxing, 11being made so it can be tight ened or loosened or clamped by the hand-1ever HZ. These guide-arms can be moved up and down so as to adjust theworking-part of the saw riage.

to the diameter of the log on the carp;

Lll

The guide balanceweight Gb is attached to a rope, O, which passes overpulleys 1 and 2 and down, and is fastened in a staple upon the guide, asshown in Fig. 1. This weight balances the weight of the guide-frame, sothat it may be readily moved up and down, and when it is in properposition it is tightened and held by means of the hand-lever HZ.

In Fig. 2 I illustrate my adjustable guide, which is screwed to theguide-arms Ga Ga. Lugs 3 and 4 in the base-plate P are threaded, and theends of the guide-arms are tapped to fit them. (See Fig. 5.) SZ is aslot in the plate P, through which'a bolt, a passes, having a nut, a.This slot is to allow the movable plate Pnr to be moved in the directionof its length. This plate Pm has lugsfor boxing attached, 1w br", inwhich the axis a of the grooved wheel G has bearings. A side view ofthis is shown in Fig. This wheel G10 is grooved in the center, so as toallow the back edge of the saw to tit into its groove, and by looseningthe nut 11 the whole plate Pm, with the grooved wheel G10, may becrowded up against the back of the saw, and the saw be thus forcedoutward whenever desired. This is valuable whenever the saw needsadjusting, so as to bring its cutting-edge close to the log. The platePm and wheel G are capable-also'of a lateral adjustment by means of thescrew-rod s)- and its hand-wheel H10". The slots SI SI are formed in thejaw-plates jp of the guides, and taps b which enter the plate Pm, asshown in Fig. 5, pass through these slots, and of course a lateralmovement of these taps and the plate Pm, into which they are screwed, isallowed to the length of the slot SI. This adjustment is necessarywhenever the saw runs crooked in the log.

In Fig. 6 is a detail, upon an enlarged scale, of the adjusting device,by means of which the right-hand side of the cross-head is thrown in orout. This is accomplished by means of a hand-wheel, H10", opera-ting aright-andleft socket, Rls, into which enter the threaded ends of therods S" and S, the latter having an eccentric-arm, Ea, whichiskeyed-upon a pin, p eccentrically turn ed upon the end of the standardClzr, so-as to-give an eccentric movement to the latter, and to provideroom for this without cramping, the boxes I): and 1);" are a littleelongated, all of which is illustrated in Fig. which is drawn on anenlarged scale.

The saw-pulleys Sp and S1) are made of solid wedge-shaped sections ofwood, 'the'grain running fromthe center toward the circun'iference. Thelower wheel is made of three and the upper one of two thicknesses ofwood to each sec tion. These are all-glued together and turned upandfitted into an iron hub formed of two parts, an inner flange having aboxing, and an V outer flange, and these flanges-are boltedtogetherthrough the wheel, as shown in crosssection, Fig. The periphery iscoated with gum. The wheel being solid, instead of being formed withopenings, presents less resistance rection it does on ordinary pulleys,and the saw will run straighter, more even, and d9 faster and betterwork than saws run on "pul leys now in use.

The operation of my machine will doubtless be readily understood fromthe drawings and the explanation already given.

The frame-work is constructed of strong timbers carefully put together,and is adapted to be taken up and set down again-that is, it isportablewith little difficulty. The power is of course applied by meansof an ordinary belt connecting the driving-pulley Dp with a pulley onthe engine.

hat I claim, and desire to secure by Letters Patent, is the following:

1. In a bandsaw mill, the portable frame F F, in combination with thesolid saw-put leys S1) S1), the saw S, the guide frame and arms, the'cone wheels Cw Cw and their belt tightening mechanism, and means foractuating the same, substantially as described.

In a band saw mill, a portable frame sustaining the driving mechanism,and an upper saw-pulley, whose axle revolves in an adjustable boxing, incombination with a saw, guide-arms, and an adjustable guide connectedtherewith, whose vertical movement is regulated by counter-balance andits horizontal movement by a ,wheel and set'screw, substan tially asdescribed.

3. In aband saw mill, a movable cross-head eccentric adjusting device,whereby that standard of the cross-head may be thrown in or out and therun of the saw changed on the sawpulley, substantially as and for thepurpose described.

4. Aneccentric adjusting device attached I to the lower end of theright-hand standard of a cross-head frame, whereby-the standard may bethrown in or out, substantially as and for the purpose described.

In a band saw mill, an upper saw-pulley whose axle works in a boxingconnected with a movable crosshead, and capable of an adjustment at apoint between the cross-head and thc'saw-pulley by means of a rod operating directly upon the boxing of the shaft next to the saw-pulley, andactuated by a lever working at right angles to the rod, the rod be ingparallel with the sides of the saw-pulley, whereby the saw-pulley andaxle may be lifted and the saw tightened by raising and loosened bylowering the same, substantially as decribed.

6.- In a band sawmill, an upper sawqpulley whose axle works in anelongated boxing connected with a movable cross-head, and adapted tobeadjusted at the end farthest from the saw-pulley by means of a screw-rodworking in a nut formed on the under side of the boxing, at a pointoutside the cross-head and near the end of the axle, whereby thesaw-pulley may be thrown outward by raising and.

its grooved wheel, is adjustable from and to ward the back edge of thesaw in a line at right angles to the axis of the wheel, substantially asdescribed.

8. In a band saw mill, an adjustable guide attached to the lower ends ofthe guide-arms, wherein a wheel having a circumferential groove toreceive the back edge of a band-saw revolves on bearings connectedwith an1ovablc plate which is capable of an adjustment in the line of the axisof the wheel for straight ening the cut of the saw in the log,substantially as described.

9. An adjustable guide for a band-saw, attached to the lower ends of theguide-arms, wherein a wheel having a central groove for receiving theback edge of the saw revolves 011 bearings attached to a movable plateso connected underneath a base-plate as to be adjustable, by means of ascrew-rod at the end farthest from the saw, in a line with the axis ofthe grooved wheel, substantially as described.

10; In an adjustable saw-guide, the combination of a base-plate, P,slotted to admit a wheel, Gw, having a circumferential groove,

and a band-saw, S, a movable plate, Pm, connected therewith by means ofa stay-nut, the

movable plate having bearings for the axis of the grooved wheel Gw,slotted jaw-plates jg), bolted to the movable plate, and susceptible ofadjustment thereon by means of set-screws working in slots, thescrew-rod Sr, and its hand-wheel, substantially as and for the purposedescribed. I

In witnesswhereof I have hereunto set my hand this 27th day of February,1883.

H. WV. GROVES.

\Vitnesses:

(J. P. JACOBS, J AeoB W. LOESSER.

